A porous hydrophobic polymer additive for iron-based carbon dioxide fischer-tropsch synthesis and use thereof

Abstract

This invention discloses a porous hydrophobic polymer additive for the Fischer-Tropsch synthesis of iron-based carbon dioxide. The preparation includes the following steps: In a nitrogen atmosphere, polyvinyl alcohol, sodium dodecyl sulfonate, and water are fully dissolved in water at a mass ratio of 40:3:(10000-15000) to prepare an aqueous solution A. Styrene, divinylbenzene, benzoyl peroxide, toluene, n-heptane, and dichloroethane are added to aqueous solution A at a mass ratio of 5:(3.125-12.5):0.2:4:3:2.5. The mixture is stirred continuously for 3-4 hours. The reaction product is washed sequentially with methanol, acetone, and deionized water. The resulting solid product, after drying, is the porous hydrophobic polymer additive. For application, the iron-based catalyst and the porous hydrophobic polymer additive are mixed uniformly at a mass ratio of (1-5):1. This method utilizes the hydrophobic surface and pore structure of the porous hydrophobic polymer to simultaneously promote the rapid diffusion of water and heavy products, solving the problem of active site coverage caused by the accumulation of heavy products on the surface, which is difficult to address with traditional modification methods.

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